• Alumina Bubble Brick
  • Alumina Bubble Brick
  • Alumina Bubble Brick
  • Alumina Bubble Brick
  • Alumina Bubble Brick

Alumina Bubble Brick

  • AL2O3 :≥85
  • SiO2 :≤15
  • Maximum Service Temperature :1680
  • Cold Crushing Strength :≥12
  • Refractoriness Under Load (0.1Mpa, 0.6%) ℃:≥1650
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CUNSE alumina bubble brick is made of alumina hollow ball as raw material, high-performance powder as additive, and organic material as the temporary binding agent, after mixing, drying, forming, firing at high temperature in shuttle kiln, the whole process is finished.
The quality of alumina bubble brick has reached or exceeded the level of similar products at home and abroad.
Features:
1. Excellent thermal shock resistance, low thermal conductivity and good performance of insulation.
2. High temperature resistance as Al2O3 content is≥85%.
3. Reduce furnace weight as there are amount of closed pores in alumina bubble brick.
4. Strong ability to resist erosion of gas and slag.
5. Direct contact with flame.
Application:
It is suitable for linings of heating furnace. 

Item

Alumina Bubble Brick

CH-85

CH-90

CH-99

AL2O3                             %

≥85

≥90

≥99

SiO2                              %

≤15

≤8

≤0.2

Fe2O3                             %

≤0.2

≤0.2

≤0.2

Maximum Service Temperature        ℃

1680

1700

1800

Bulk Density                      g/cm3

1.4-1.7

1.4-1.7

1.4-1.7

Cold Crushing Strength               Mpa

≥12

≥10

≥9

Refractoriness Under Load (0.1Mpa, 0.6%) ℃

≥1650

≥1700

≥1700

Permanent Linear Change (1600℃*3h)   %

±0.3

±0.3

±0.3

Thermal Expansion Coefficient

(*10-6,room temperature-1300℃)       %

~7.8

~8.0

~8.6

Thermal Conductivity Coefficient

( Average 800℃)                w/m.k

≤0.6

≤0.7

≤1.5

 

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